Soap



FIG. 1 is a perspective view of a soap showing my new design;

FIG. 2 is a front view thereof, a rear view being symmetrical to the front view;

FIG. 3 is a right side view thereof, a left side view being symmetrical to the right side view; and,

FIG. 4 is a top view thereof, a bottom view being symmetrical to the top view. 

The ornamental design for a soap, as shown. 